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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #41  
Old 15th July 2021
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Not really.

I will hazard a guess and say if it's been sitting on it's side-stand for two years the clutch basket has oil in it.

This will mean a removal and clean at a minimum. Sorry. That's life.

There is always the chance it was converted to a wet clutch. HD made a kit. But it probably needs to come aprt.

That's a 2 hour job from start to finish so, no big deal.
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  #42  
Old 4th August 2021
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Default Update

Thanks all for your support! On the road, after new clutch, new generator, and new carb! Went for a shakedown ride from San Francisco to Santa Rosa.

I replaced .30 idle jet with .35 on advice from someone with more wisdom than me. Problem is she is still a bitch to start! Tried the Mikuni advice to engage enricher, 4-5 prime kicks, then switch on magneto and go. But she won’t… took mean hour to start it in front of an audience in Santa Rosa- seem to have to do the above, but then hold throttle open to get her to start.

Any ideas welcome. She is running well once going- good acceleration, power etc. But my whole body is hurting two days later. Need a consistent start procedure that won’t kill me.

I will check valve adjustment and recheck intake for leaks.

It was an awesome morning riding the backroads through Sonoma until I ran out of gas 4 blocks from home!
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  #43  
Old 4th August 2021
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Re: starting the bike, I always run Mikunis on all of my old bikes. Closest to your bike, I had a ‘59 CH. When cold, I’d kick 3-4 times with the enrichener on and no spark. Then, with spark, I would kick with the throttle open between 1/2 and 3/4. When hot, I’d give a good swift kick while holding the throttle wide open. If it wouldn’t start w/i 3 kicks , I would put the enrichener on and kick with either no or a little throttle. This worked very well for me. If all else fails, clear things out by kicking through with no spark while holding the throttle wide open. After that ,start the process again.
One other thought. I recently learned that there are now Chinese knock-offs . Be sure that you have the real deal. The Sudco Company lists some things to look for to determine if the carb is real or not.
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  #44  
Old 4th August 2021
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Default Thanks doc308

Your procedure sounds pretty close to what seems to be working for me. I will continue to try to find tune. I bought the Mikuni VM38-9 along with extra .32.5 and .35 pilot jets from Niche cycles, a reputable Mikuni dealer!

I currently have the magneto tightened down so I can’t adjust for starting- I may experiment with that a bit too, as well as some way to more easily adjust/lock without getting out wrenches.
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  #45  
Old 4th August 2021
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not starting after 4-5 prime kicks unless the throttle is held wide open tells me it's flooded from too many prime kicks.i've learned this from kick starting my own bike.1960 XLCH.
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  #46  
Old 5th August 2021
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That's a reliable way to start one. No guessing, You are coming from a known place (it's flooded)
Load it up with fuel and it's less likely to kick back. Not as easy though as yer gonna kick it a couple more times. (some need the exercise)
It's not going to pop into life, it will blubber and belch a satisfying cloud of black smoke.

The down side of this is the gas that gets in the oil from doing this.
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  #47  
Old 5th August 2021
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Have you tried with enrichener on and no prime kicks? My bike (not a magneto ignition) starts very easily like this. I feel like if putting in the larger jets makes starting easier, then you might have an intake air leak.
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  #48  
Old 5th August 2021
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Quote:
Originally Posted by ryder rick View Post

The down side of this is the gas that gets in the oil from doing this.
the other downside is it starts up at 5000 rpm.
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  #49  
Old 5th August 2021
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I do envy you guys who can still kick 3 and 4 times.

And don't forget, if you make it look easy to the bystanders they won't think it's a hot rod engine. (Which it is).
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  #50  
Old 5th August 2021
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Quote:
Originally Posted by brucstoudt View Post
the other downside is it starts up at 5000 rpm.
Or 6 depending on how "Itallian" you are....
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